<template>
    <transition name="slide">
        <div class="user-center">
            <div class="back" @click="back">
                <i class="icon-back"></i>
            </div>
            <div class="switches-wrapper">
                <switches @switch="switchItem" :switches="switches" :currentIndex="currentIndex"></switches>
            </div>
            <div ref="playBtn" class="play-btn" @click="random">
                <i class="icon-play"></i>
                <span class="text">随机播放全部</span>
            </div>
            <div class="list-wrapper" ref="listWrapper">
                <scroll ref="favoriteList" class="list-scroll" v-if="currentIndex===0" :data="favoriteList">
                    <div class="list-inner">
                        <song-list :songs="favoriteList" @select="selectSong"></song-list>
                    </div>
                </scroll>
                <scroll ref="playList" class="list-scroll" v-if="currentIndex===1" :data="playHistory">
                    <div class="list-inner">
                        <song-list :songs="playHistory" @select="selectSong"></song-list>
                    </div>
                </scroll>
            </div>
            <div class="no-result-wrapper" v-show="noResult">
                <no-result :title="noResultDesc"></no-result>
            </div>
        </div>
    </transition>
</template>


<script type="text/ecmascript-6">
  import Switches from 'base/switches/switches'
  import {mapGetters, mapActions} from 'vuex'
  import Scroll from 'base/scroll/scroll'
  import SongList from 'base/song-list/song-list'
  import Song from 'common/js/song'
  import {playlistMixin} from 'common/js/mixin'
  import NoResult from 'base/no-result/no-result'

  export default {
    mixins: [playlistMixin],
    name: "user-center",// 个人中心
    data() {
      return {
        currentIndex: 0,
        switches: [
          {
            name: '我喜欢的'
          },
          {
            name: '最近听的'
          }
        ]
      }
    },
    computed: {
      ...mapGetters([
        'favoriteList',
        'playHistory'
      ]),
      noResult() {
        if (this.currentIndex === 0) {
          return !this.favoriteList.length
        } else {
          return !this.playHistory.length
        }
      },
      noResultDesc() {
        if (this.currentIndex === 0) {
          return '暂无收藏歌曲'
        } else {
          return '你还没有听过歌曲'
        }
      },
    },
    methods: {
      handlePlaylist(playlist) {
        const bottom = playlist.length > 0 ? '60px' : ''
        this.$refs.listWrapper.style.bottom = bottom
        this.$refs.favoriteList && this.$refs.favoriteList.refresh()
        this.$refs.playList && this.$refs.playList.refresh()
      },
      switchItem(index) {
        this.currentIndex = index
      },
      selectSong(song) {
        this.insertSong(new Song(song))
      },
      back() {
        this.$router.back()
      },
      random() {
        let list = this.currentIndex === 0 ? this.favoriteList : this.playHistory
        if (list.length === 0) {
          return
        }
        list = list.map((song) => {
          return new Song(song)
        })
        this.randomPlay({
          list
        })
      },
      ...mapActions([
        'insertSong',
        'randomPlay'
      ])
    },
    components: {
      Switches,
      Scroll,
      SongList,
      NoResult
    }
  }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
    @import "~common/stylus/variable"

    .user-center
        position: fixed
        top: 0
        bottom: 0
        z-index: 100
        width: 100%
        background: $color-background
        &.slide-enter-active, &.slide-leave-active
            transition: all 0.3s
        &.slide-enter, &.slide-leave-to
            transform: translate3d(100%, 0, 0)
        .back
            position absolute
            top: 0
            left: 6px
            z-index: 50
            .icon-back
                display: block
                padding: 10px
                font-size: $font-size-large-x
                color: $color-theme
        .switches-wrapper
            margin: 10px 0 30px 0
        .play-btn
            box-sizing: border-box
            width: 135px
            padding: 7px 0
            margin: 0 auto
            text-align: center
            border: 1px solid  $color-text-l
            color: $color-text-l
            border-radius: 100px
            font-size: 0
            .icon-play
                display: inline-block
                vertical-align: middle
                margin-right: 6px
                font-size: $font-size-medium-x
            .text
                display: inline-block
                vertical-align: middle
                font-size: $font-size-small
        .list-wrapper
            position: absolute
            top: 110px
            bottom: 0
            width: 100%
            .list-scroll
                height: 100%
                overflow: hidden
                .list-inner
                    padding: 20px 30px
        .no-result-wrapper
            position: absolute
            width: 100%
            top: 50%
            transform: translateY(-50%)
</style>